Metal-cutting machine.



e. P. BISSER & A. P. WILLIAMS.

METAL CUTTING MACHINE.

APPLICATION FILED act. 16. m7.

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MET'ALCUTTING MACHINE. APPLICATION FILED OCT. 16. 1911.

Patented Apr. 15, 1919.

2 SHEETS-SHEET 2.

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METAIFCUTTING MACHINE.

Specification of Letters Patent.

Patented Apr. 15, 1919.

Application filed October 16, 1917. Serial No. 196,838.

To all whom it may concern:

Be itknownthat we, GEORGE P. RIssER and ALBERT P. WILLIAMS, citizens ofthe United States, residing at Seattle, in the county of King and Stateof Washington, haveinvented certain new and useful ImprovementsinMetal-Cutting Machines, of

which the following is a specification.

This invention relates to metal cutting machines, and its object is toprovide a device of this character which is designed, moreparticularly,to be employed in cutting off superfluous endsof bolts driven through aships hull to aflord proper lengths for riveting.

. Afurther object of the invention is to provide for the operativemechanism a supporting frame provided with means for engaging the workandalso-havingbraces for maintaining the machine in operative position.

The invention consists in the novel construction, adaptation andcombination of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a view in side elevationshowing an em-' bodiment of the present invention illustrated asapplied. Fig. 2 is a plan view of the same. Fig. 3 is afront elevationalview thereof. Fig. 4 is a fragmentary longitudinal vertical sectiontaken through 44 of Fig. 3. .Fig.15-is a detail sectional View through5.5 of Figs. 1 and 2. wReferring to. the drawings, the. referencecharacter B. designates-a bolt driven through a frame member 6 of a.vessels hull, it being required to out said bolt ofi at the planeindicatedbybrokenlines a'cw in Fig. 1 at a suitable length for riveting.

In carrying out our invention we pro vide a frameconsisting in agirdermember 7 having at one end a head elementS provided with afront face 9disposed in substantially rectangular relations to the girder member 7Formed in one side of said head element is a finger 10 provided at itsunderside with a notch 11 adapted tohook over the bolt, as represented.in Fig. 3. This finger serves also as a Jaw in cooperation withanopposingjaw 12 formed on the endof a lever 13 fulcrumed by a pin, 14 andis regulated by means of a screw 15 engaging in a threaded apertureprovided in the end of the lever. The screw 15 is operated by a handwheel 16 and impinges against a lug 17 provided on the frame member 7,as shown in Figs. 1 and 2.

- The gripping end of the jaw 12 isdesirably'serrated to afiord teeth18. The fulcrum pin 14 is carried by a vertically movable plate 19,which is secured at adjusted elevations by. means of bolts 20 passingthrough elongated slots 21 provided in the plate and holes 22 providedin ears 23 formed on the frame member 7 V The purpose of verticallyadjusting the plate 19 is to locate the height of fulcrum pin 14 so asto present the aw face 12 in substantially rectangular relations to theframe member 7 for various diameters of bolt B.

Formed or provided on the frame member 7 are standards 24 in which arejournaled a shaft 25. Mounted on this shaft is a sleeve 26 constitutingpart of a rotatable frame having at one end a radially disposed arm 27and at its other end a wheel 28 which is provided with worm teeth 29.Securedin a saw arbor 30. t

31 represents a circular saw mounted on a collar 32 which is rigidlysecured to the forward endofthe arbor 30, said saw being detachablyconnected to the collar 32 as by means of a set screw 33 (Fig. 4)engaging in a threadedhole in the arbor end.

34 represents a spur gear wheel secured to the rear end of said arborand driven by means of a toothed pinion 35 which is desirably formedintegral with the shaft 25.

The feeding movements of the saw are regulated by revolubly moving thesame through the agency of a feed screw 36 engaging in the worm wheelelement 28 of the aforesaid rotary frame; said feed screw is journaledin bearings 37 provided on the frame member 7, and is manipulated fromone side as by means of a crank handle 38.

The shaft 25 is rotated by means of a motor, indicated by broken lines Min Fig. 1. Said motor is desirably of the pneumatic type, one end of itsshaft being coupled with the polygonal end 25 of shaft 25, such couplingserving to support one end of the motor while its other end is supportedas by the provision of a standard 40 projecting upwardly from the rearend of the frame member 7 by the finger 1O engaging over the work orbolt B which is to be cut off. For supporting the rear end of the framewe employ extensible braces, one on each side, each consisting of a rod41 having at one end an eye 42 whereby it is hingedly connected to anapertured lug 43 depending from the adjacent side of the frame. Said rodextends into a tube 44 provided with a tapering screw-threaded extremity45 which engages in a tapering screw-threaded hole of a nut 46.v Thetapered end 45 of a rod is furthermore provided with longitudinal slots47 so that by screwing down the nut 46 the tube 44 may be clamped inadjusted position with respect to the associated rod 41.

Rigidly secured to the end of the tube 44 remote from its tapered end isa rod element 48 terminating in a point 49 adapted to penetrate in thevessel wall or frame member 6. The rod member 48 is also provided with.a branch element 50 which may be utilized to cause the penetratingpoint 49 to become engaged by driving with a hammer against the face 50Said branch may also .be utilized to disengage said penetrating point byusing a pry bar against its face 50 The operation of the invention is asfollows The operator first engages the hooked finger 10 over the end ofthe bolt B so as to have the end or face 9 of the head element 8 bearagainst the frame 6. He then adjusts and then regulates the lever 13 bymeans of screw 15 to cause the jaw 12 to firmly grip the bolt B. Themotor is'then actuated to drive the shaft 25, thereby effecting throughthe medium of the gears 35 and 34the rotation of the saw 31.

The operator then manipulates, tln ough crank handle 38, the screw 36 torevolve the saw'in the direction indicated by arrow y in Fig.3; this maybe done quite rapidly until the saw is brought into cutting relationwith the bolt and thence by a slower movement until the saw isprogressively carried through the bolt to cut the same off.

The invention is quite simple in its construction and operation, andaffords an extremely efficient manner of performing an operation whichhitherto has been done by the use of a so-called hand hack-saw or othermanually operated tools.

' What we claim, is

1. A machine for cutting'otf bolts, comprising a machine frame, a sawmounted for reciprocatory movementsthereon, means to effect suchmovements of the saw, means to rotatethe saw, a clamping jaw provided onthe frame, a lever pivotally connected to the frame and having a jawelement thereon, and means for actuating said lever to cause the jawelement thereof to cooperate with the first-named jaw to clamp the frameto a bolt which is to be out 01f.

2. A machine for cutting off bolts, com- 3. A machine for cutting offbolts, comprising a ClI'CHlZLD'SiLW, an arbor therefor, a rotary framecarrying said arbor eccentrically of the axis of said frame, apowerdriven shaft extendingaxially through the latter, gears operativelyconnecting said .7

shaft with the arbor for driving the saw, a machine frame supportingsaid rotary frame and the shaft, bolt-clamping means for securing themachine to the bolt, and adjustable means cooperating with saidboltclamping means for supporting the machine frame in operativeposition.

4. A machine for cutting off bolts, com-' prising a circular saw, anarbor therefor, a rotary frame carrying said arbor veccentrically of theaxis of said frame, adriving shaft extending axially through the latter,gears operatively connecting said shaft with the arbor for rotating thesaw, a machine frame supporting said rotary frame and the shaft, saidmachine frame having at GEORGE P. RI'SSER. ALBERT P. WILLIAMS.

Witnesses PIERRE BARNES, PETERSON.

Copies of this patent may be obtained for five cents each, by'addressing. thev Commissioner of Patents.

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